class Student:
    name = None
    gender = None
    nationality = None
    age = None


stu1 = Student()

stu1.name = 'liguang'
stu1.age = 12
stu1.nationality = 'china'
stu1.gender = 1

print("少了一个toString方法")
# 地址值
print(f"当前对象的值是：{stu1}")
